Locomotive-engine.



H. W. GARRATT. LOGOMOTIVE ENGINE. APPLICATION FILED mugs. 1908.

Patnted Eeb.16, 1909.

UNITED STATES PATENT OFFICE. HERBERT WILLIAM GARRATT, or STAMFORD HlILL,ENGLAND. Locomorrvs-ancnm. I

Specification of Letters Patent.

Patented Feb. 16, 1909'.

Application filed m 25, 1908. Serial in. 445,385.

To all whom it may concern:

Be it known that I, HERBERT WILLIAM GARRATT, a subject, of the King ofGreat Britain, residing at 25 .Leweston Place, Portland avenue, StamfordHill, in the county of Middlesex, England, have invented new and usefulImprovements in and Relating to Locomotive-Engines, of whiohthefollowing is a specification.

My invention consists of improvements in and relating to locomotiveengines, and particularly to locomotive engines of the double bogietype, the-princi al ob'ect of my improvements being to a mit o acombination of an extremely lar e boiler having a low center'of gravityand large drivin wheels if required on both bogies, the ho er and itsfittings being carried in a frame of the shortest le 11, practicable andconnected substant' yewitlrout overhang at both its. ends by swivelcentersto twoself'driven bogietanka whichfcarrythe coal and main.water-supply as well as the steam cylinders and driving mechanism forthe wheels.

OWin r to the gage of the rails being fixed the resu t of the usualarrangement of com bining a large boiler with large wheels is theraising of the center of gravity to an undue height, as: a boiler largerthan will go in between the wheels must be laced. above them, and thelarger the wheel s or the boiler, or both, the higher becomes thecenterofgrawity until it is dangerously high.

There are already various forms ofloco-.- motive engines of the doublebogie t e, de-

signed, and among these are the .airlie the Kitson Meyer and the Mallet.The leadin features of the Fairliesystem, as set outinairlie and Perkinss ecification No. 2616 of 1872, are the ap 'cation of steam to bogieframes or swive ingtrucks, the construction of double boilers with acentral or common fire box, and the employment .of a long ri id frame,termed the carrier.

frame, on wh1ch the boiler fuel bunkers and water tanks rest,- andwhichis placed above the bogie frames, and carries at or neareach end. apin or head on'whichthe said bogie fi'amesswivel. An example of theKitson- .Meyer or. Meyer-Lindner. ty e is shown in Engineem'n of 12th Ar 1907,. and in. Qassiera: ifagazine Febmary 1904 there is: arr.article: dealingwith; a; numhcr of: typesofidouble.bogiejengmes.

According-to my said invention I carry theboiler in a frame slungbetween two self there are four shown coupled on each. bogie drivenbogie tanksso that it may be aalfow H down as possible. leavin simplythe. necessary clearance for the as pan above the rail level. Unlike thecarrier frame in theFairlie and other types of double be is engines, ll.terminate my carrier frame at t e sw1veling-- heads or centers where itrests on and isconnected to the ho is tanks, and I thus-obviate. theob'ectionablia and dangerous. overhasni of the. ong frames: with theirsuperimpc. weight of the vaforesaid t pes. I may adopt. any suitableform ofbo' er and. any-convenient method of slinging its carrierframa,..sn long as the swivel centers are at the ends: in order toavoid. overhang of the above described. I

In. the accompanying sheet of. drawing; 1 illustrate. one. example ofhow-my! invention. may becarried into. ractica-l efiect.

Figure l iaasida vatinmcfralccnmctm. engine according, ta-

lam-- timr. Fig. 2*. is. a. plan. ViEW ShQWIQHg same on what is. knownas a five-chain curve; Fig. 3 is an end view, showinglleialf of one-end.and half of the other end oft engine.

In these views, a designates the.- boiler which may be of any suitabletype, for ex.- amplea boiler: of the locomotive type or. a water tubeboiler may" be adoptedowmg to. the lar espaceavailable; b: a carrier orcradle for the. boiler of any 811111761318. cum struction.and.ofther.uisite.strength; ;mtha two bogies.-and tankslhereon; at the I ton swivelcenters by which thaendsiof: 6:081!- rier frame-b areconnectedrespectively-tome. two. b ogies;:e steam cylinders which. Wll'illl...the necessarydriviug gear are: mountedoaeach. of. the bogiesand 111 thepositions indicated. I or in any other convenient positiom as-may bedesired according to the arrangement, number and-coupling of the-wheels;f thecab for the driver;- 9 driving wheels of which.

in this instance, but. any other. suitable number may beemployedandhqleading or trail-- ing wheels on each'bogie. It will be. obviousfrom the description and; drawing. that. in. this arrangement the boilercan be carriedso. as to bring the center of gravit to; the'loweat, pointpossible and. practicab e,. and; it, will alstrbe readily: understood.that: the firehcxr. m beef. 9 tawidthandcapacity.

w 'andwatentanka are bogie tankac, and emanates-in theaforseaiddoublebogie. typesof. locomotive engines placed on thecarrieriframe In. myarrangement these tanks and their whole weight are on 'theb'ogies, saythe fuel and these three portions consisting of two self driven bogietanks with large wheels or in,

fact any sized wheelson both bogies, and the boiler with its fittingsand some details on the boiler frame, and this construction enables thelocomotive to travel round sharp curves with the. very great advanta ethat the center line of the wholelength of t central portion, when sotravelin round curves,

forms a chord of the circle, w ch is the center line-of the rails forminthe said curve.

.As already stated I obvlate the objectionable overhan common to otherexisting types'of doub e bogie engines by terminating the carrier-frameb at the swiveling centers d Where it isfconnected to the bogies. Thisis a-great and important: advantage when oing round curves as itcounteracts theten ency of the engine to overbalance and thus im-'proves its stability. In prior constructions of the double bogie typethe projection or plerticularly when rou overhang of the frame beyondthe swivel centers and the heavy weight thereon has rendered the wholelocomotive unstable,

7 r ding curves.

rther enabled to place the tanks centrally instead of having them, as inordinary constructions, at the sides, which-,is disadvantageous as sidetankslimit the diameter of the boiler,'and thisweight at'either outsideed e of the frame directly reduces the stabih'ty of,the-locomotive.Further the carrier frame is relievedof the weight of these tanks,

7 and the tendency of the locomotive to roll is immensel lessened.

If required an additional water tank may 'be placed beneath the barrelof the boiler, if

that be-of locomotive type, thus still further lowering the centerofgravity. v

The whole of the'space .between the sides of the" carrier frame, aboveand below, subject, to the limitations ofthe loading gage of the railwayis available for the boiler and fire .box, which can thus be of greatdiameter and v width res ectively.

As the filer is entirely between the self driven bogie tanks, in myarrangement, I

can employ w eels of any required diameter,

. on both bogies, and all of thesewheelsmay be utilized for tractive puoses ifreqaiired thus enabling the full weig t of the engine water,fuel, and bogie tanks to be used for ad I ame1a,aos

hesion, whereby I obtain an engine of very great tractive forcecombinedwith spee large water and fuel capacity, and a low center of gravityirrespective of the size of the driving wheels. hurther a very excellentlook out is providedfoi: the driver owing to the low position of theboiler; and'owingalso to 1 the space available, the water and coal tanksalthough of great capacity, can be kept low and flat, thus/greatlyassisting to render the engine stable;

My improved construction ofengine gives a'normai footp.ate as compared'th the inconvenient one at the side as in he Fairlie type; and furtherif required a cab f can be placed at each end of the-boiler. Thedistribution of weight on the bogies isgreatly superior to the'tson-Meyer type of engine. In my improved type, the weights on eachbogie are equal or practically so, whether the engine is empty or infull working .order, whereas in the Kitson-Meyer engine, this variesconsiderablyms the water and coal are consumed, thus afl'ecting theadhesion of the wheels. 90 The steam may be conveyed from a the boi.erto the cylinders e by any suitable means, for instance, by pipes and aball and socket joint at the center of the bogie center or in anyordinary way .by means of flexible connections, and the exhaust returnedin a similar manner, or through the bogie center hearings, which may beprovidedwith suit- 1 eble ports and passages in the bearing surace.

What I claim as my invention and desire to secure by Letters Patentis 1. A double bogie locomotive com a pair of bo 'es,- a frame havingits en s supported by t e bogies, a boiaer and fittings carried by saidframe, driving mechanism carried by the bogies, andgipes connecting vsaid driving mechanism wit the boiler.

2. A double be 'e locomotive comprising a frame, a pair of ogies,.meansforp1voting each ,end of the frame to the bogies, a boiler and fittingsc ied by said frame, steam c linders, and 'ving mechanism carried y 7said bogies, and pipes-connecting said cylin ders with the honors i 3. Adouble. bogie locomotive comprisinga frame, a boiler and cab carriedthereby, a pair of bogies, swiveled -heads,.connecting .each end 0 theframe to one of the b0 'es with. a minimum oyerhan steam cylin 'ers onthe bogies, mec anism connecting said cylinders with t 0 wheels of thebogies, pipes connecting said. cylinderswith the oi.er, main water andfuel tanks carried-by the bogies. 9

4. A double bogie locomotive-comprising a frame, a boiler and cabcarried thereby, a pair of bogies, swiveled heads connecting each end 0Y theframetopne of the b0 'es .with a minimum overhang, steam cylin ers1 80:

onJhe bogies, drivinimechanism connecting name to this specification inthe presence of ssid cylinders with t gwheelsl of the blfgiis, twosubscribiiig witnesses. 1 es connectin sai c iin ers wit t e o iler',main wat r and fu e l tanks carried by HERBERT WILLIAM 5-"the-bogies,*and a water tank carried under Witnesses:

the frame; 4 HERBERT ROWLAND ABBEY,

In testimony whereof I have signed my LEONARD HARRISON.

